Function formatProgress

frontend/tests/app.unit.test.js:42–45

* Format transmission progress (0–100) to a percentage string. * Mirrors app.js `methods.formatProgress`.

(progress)

 * Mirrors app.js `methods.formatProgress`.
 */
function formatProgress(progress) {
  const value = Number(progress || 0);
  return `${Math.max(0, Math.min(100, value)).toFixed(0)}%`;
}

/**
 * Format simulation seconds to "HH:MM:SS".